The worst floods in decades have killed at least 112 people in the central part of the mainland this week, forcing local governments to step up efforts to prevent outbreaks of infectious diseases and food shortages. Xinhua said 34 more people were missing in Sichuan , Chongqing and Anhui , and nearly 36 million people had been evacuated over the past week. Floodwaters had inundated about 6.7 million hectares of farmland in the three areas, inflicting about 11.8 billion yuan in economic losses. The Anhui health department has set up five teams to deal with the aftermath of the floods and prevent epidemics in the summer heat, dispatching more than 1,000 medical units to the disaster-affected regions and ordering 18 other teams to remain on standby around the clock. Xinhua said the medical teams had reached 14 cities and 67 counties within the disaster areas. Their top priorities included ensuring all sources of drinking water were clean, and teaching villagers how to protect themselves against contracting any infectious diseases. The report said the epidemic situation in Anhui was under control, but it did not give any more details. The central government and Anhui authorities have earmarked 49.3 million yuan in relief funds to help local officials deal with the aftermath of the floods, Xinhua said. More than 360,000 hectares of crops in the province have been ravaged, raising the prospect of a major increase in prices of farm produce. In response, the provincial pricing bureau issued a notice to local officials urging them to keep an eye on inflation in food prices, Xinhua said. The notice stipulates that local officials appoint special staff to check the prices of cooking oil, pork, vegetables and processed foods every day and regularly report to the bureau. It also demands officials intervene to stabilise market prices if abnormal inflation is detected. By Thursday, floods accounted for 403 deaths this year, with 105 people missing. More than 82 million people across the mainland have been affected, with 3.17 million displaced and 300,000 houses destroyed. The bill for the damage stands at 31.9 billion yuan. Meanwhile, in Hunan's Dongting Lake region, more than 22 cities and counties have been overrun by hundreds of millions of field mice fleeing rising waters. Thousands of domestic cats and dogs have died after eating mice killed by poison that was used with the backing of local officials.